MS II week 7 Flashcards
BBC from where/what layer
BBC’s are malignant tumors that arise from epidermis from skin that can grow hair
where would you not find BBC
Lip border, mucus membranes
how invasive are BBCs
locally invasive, rarely mets
bad spots for BBCs
Because can invade deeply here into bone and dura matter near eyes nasal labial folds ear canal posterior suricular sulcus
majority of non melanoma skin cancers are what
BCC, mostly in men, closer to equator.
increases with age
BCC risk factors
Hx of BBC caucasion O blood type UV exposure childhood sun exposure # of past sunburns PUVA
how long to grow BCC
20 years more or less
5 types of BBC
- Nodular: most common, pearly papule with telangiectasias
MICRONODULAR: firm, white yellow
INFILTRATIVE: resembles melanoma, margins less clear
MORPHEAFORM: white waxy sclerotic, looks like scleroderma (iceburg)
SUPERFICIAL: least agressive
what BBC needs the largest border around it
morpheoform, goes deep and wide under the skin often 7.2 mm bigger than it looks.
What is the least agressive BBC
superficial: red, round, well circumscribed patch or scaling plaque, looks like psoriasis.
what can BBC look like
nevi, cysts, molluscum contagiosum, SCC,
nummular derm, psoriatic plaques, lichenoid keratosis, actinic keratosis
Morphea BBC DDX
scar, melanoma, nevus
Treatment of BBC
Electrodisseccation and curettage Surgical excision MOHs micrographic surgery cryotherapy topical 5 fluorouracil and imiquimod: (weeks to months)
ED and C
high recurrence when large
Actinic keratosis (solar)
Abnormal keratinocytes: confined to epidermis,
premalignant
